Device for regulating cylinders in a printing machine

Abstract

A pressure force exerted by first and second cylinders upon at least a third cylinder in a printing machine is regulated by a pressure regulating device. The device can also be using for moving a first cylinder and at least one second cylinder into and out of contact with a third cylinder. Actuators, which exert a radial force on a cylinder cooperating with the actuators, are provided. An aperture angle between the radial forces exerted by two actuators on the same cylinder is the same in both cylinders. That aperture angle is independent of an aperture angle formed by the pressure force exerted by the first and second cylinders on the third cylinder.

Description

FIELD OF THE INVENTION [0001] The present invention is directed to devices for setting a pressure force exerted by two rollers on another roller of a printing press, and to devices for bringing a roller into or out of contact with at least one other of these rollers. Actuators are provided for at least one, and possibly two of these rollers. These actuators exert radially directed forces. BACKGROUND OF THE INVENTION [0002] Inking units or dampening units of printing presses are employed for conveying an ink or a required dampening agent from appropriate supply devices to printing zone. Rollers or cylinders are provided in the inking unit or in the dampening unit for forming the required ink film or dampening agent film. The term roller and cylinder have the same meaning for understanding the present invention and will be used interchangeably. The rollers come into contact with each other along so-called roller strips. The ink film or the dampening agent film can be transferred in th...

AI Technical Summary

Benefits of technology

The solution enables efficient, simultaneous adjustment of contact pressures across multiple roller strips, reducing downtime and maintenance needs, while ensuring precise control over ink or dampening agent transfer.

Problems solved by technology

In other words, although the size of the force for pressing the application roller can be changed, the direction of the force is unchangeably preset by the structural embodiment of the setting device.

In connection with this device, it is disadvantageous that the pistons and pivot levers require a considerable amount of structural space for their arrangement and for performing the movement in the course of their actuation in the printing group.

They are also exposed to considerable soiling, for example by sprayed ink fog, because of their immediate closeness to ink-carrying rollers, from which exposure a certain susceptibility to malfunctions arises.

Time-intensive and cost-intensive cleaning and maintenance work are required in a hard to access place of the printing press.

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